c尖锐的正则表达式替换任何单词的第一个或最后一个字符 [英] c sharp regex replace first or last character of any word

问题描述

想通过使用正则表达式删除任何单词的第一个和最后一个字符....

例如..

(HELLO)(WORLD)将返回=== HELLO WORLD

和(HE/LLO)(WO/RLD)将返回====== HE/LLO WO/RLD



或//Hello WOrld/将返回========= Hello WOrld

或(HELLO)(W/ORLD)STACKOVERFLOW)将返回=== HELLO W/ORLD STACKOVERFLOW

(He(Lo)Wo(R)ld将返回===== He(Lo Wo(R)ld

我想替换所有括号..我希望替换任何单词的第一个和最后一个括号.....

我正在尝试...

temp = Regex.Replace(temp，@"^ [！@#$％^&*()_ + = [{]}; ::<> | ./?,\''""-]+"， ");

但是此正则表达式方程式仅在FOUND ...删除FIRSt CHaracter时使用. | ./?,\''""-]+，");

但是此正则表达式方程式只能删除FIRSt CHaracter IF FOUND....

为什么要使用正则表达式?

 // 我个人将其作为扩展方法
公共 静态 字符串 ReplaceOccurrence(此 字符串 str，字符串目标，字符串替换， int  pos = -1;
     int  counted =  0 ;
    字符串 result = " ;
    做
    {
        pos =(pos >  =  0 )? str.IndexOf(target，pos + 1):pos = str.IndexOf(target);
        如果(pos >  =  0 )
        {
            计数++;
        }
    } 同时(pos >  =  0  &&计数！=计数);
    如果(pos >  =  0 )
    {
        结果= str.Insert(pos，替换).Remove(pos +替换.Length，target.Length);
    }
    返回结果；
} 

用法:

 字符串 x = " ;
字符串 y = " ;

y = ReplaceOccurrence(x，" ，"  ^"，//  result ="^ hello)(世界)" 
y = ReplaceOccurrence(x，" ，"  ^"，//  result =(hello)^ world)" 
y = ReplaceOccurrence(x，" ，"  ^"，//  result =(你好)(world ^" 
y = ReplaceOccurrence(x，" ，"  ZZZZ"，//  result =(你好)ZZZZworld)" 
y = ReplaceOccurrence(x，" ，" "，//  result =(你好)(世界) 

want to remove first and last character of any word by using regex....

FOr example..

(HELLO) (WORLD) will return === HELLO WORLD

and (HE/LLO) (WO/RLD) will return ====== HE/LLO WO/RLD



or //Hello WOrld/ will return ========= Hello WOrld

or (HELLO) (W/ORLD) STACKOVERFLOW) will return === HELLO W/ORLD STACKOVERFLOW

(He(Lo) Wo(R)ld will return ===== He(Lo Wo(R)ld

I dun want to replace all parenthesis ..I wish to replace First and last parenthesis of any word.....

I m trying this ...

temp = Regex.Replace(temp, @"^[!@#$%^&*()_+=[{]};:<>|./?,\''""-]+", " ");

BUT this regex equation ONly remove FIRSt CHaracter IF FOund....

解决方案

%^&*()_+=[{]};:<>|./?,\''""-]+", " ");

BUT this regex equation ONly remove FIRSt CHaracter IF FOund....

Why use regex?

// I would personally make this an extension method
public static string ReplaceOccurrence(this string str, string target, string replacement, int count)
{
    int pos = -1;
    int counted = 0;
    string result = "";
    do
    {
        pos = (pos >= 0) ? str.IndexOf(target, pos+1) : pos = str.IndexOf(target);
        if (pos >= 0)
        {
            counted++;    
        }	
    } while (pos >= 0 && counted != count);
    if (pos >= 0)
    {
        result = str.Insert(pos, replacement).Remove(pos + replacement.Length, target.Length);
    }
    return result;
}

Usage:

string x = "(hello) (world)";
string y = "";

y = ReplaceOccurrence(x, "(", "^", 1); // result = "^hello) (world)"
y = ReplaceOccurrence(x, "(", "^", 2); // result = "(hello) ^world)"
y = ReplaceOccurrence(x, ")", "^", 2); // result = "(hello) (world^"
y = ReplaceOccurrence(x, "(", "ZZZZ", 2); // result = "(hello) ZZZZworld)"
y = ReplaceOccurrence(x, ")", "", 2); // result = "(hello) (world"

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